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1.
PhytoKeys ; 246: 27-42, 2024.
Article in English | MEDLINE | ID: mdl-39239322

ABSTRACT

A new species of the firmoss from China, Huperziacrassifolia sp. nov., is described and illustrated based on morphological characters and molecular evidence. The new species resembles species associated with the H.javanica complex, in particular H.javanica based on leaf shape and serrations, but can be easily distinguished by elliptic lanceolate and thick coriaceous leaves, well differentiated seasonal constriction zones, and reflexed leaf margins when get dried. Phylogenomic reconstruction using whole chloroplast genome sequences recovered H.crassifolia as sister to H.sutchueniana and only distantly related to morphological similar species H.javanica, H.nanlingensis, and H.serrata. The genome size 2C = 17.2 pg indicated the new species to be a tetraploid, whereas diploid H.javanica had a genome size of 8.7 pg. Morphological characters, distribution, and conservation status of the new species are also presented.

2.
Regen Ther ; 26: 578-589, 2024 Jun.
Article in English | MEDLINE | ID: mdl-39239474

ABSTRACT

The management of burn injuries presents a significant challenge in clinical settings, yet an optimal solution remains elusive. Therefore, this study aimed to develop a topical therapeutic formulation to address the complex issues hindering burn wound healing. Emphasizing the sustained presence of bioactive principles, we synthesized a bioactive gel derived from decellularized caprine small intestine submucosa (D-CIS) and encapsulated it with nano-formulations of cerium oxide and curcumin to create a burn wound dressing material with enhanced properties. The choice of encapsulated components was guided by their antimicrobial, antioxidant, and immune-modulating characteristics, along with their inherent ability to gradually release bioactive substances. The encapsulated (cerium oxide and curcumin) D-CIS bioactive gel demonstrated a range of properties, including antimicrobial, antioxidant, and anti-inflammatory effects, along with sustained release kinetics of bioactive molecules. These combined effects facilitated accelerated burn wound healing by mitigating oxidative stress, reducing inflammation, and promoting cell recruitment for epithelial and vascular regeneration. This study contributes to the development of a novel bioactive gel incorporating cerium oxide and curcumin, offering a promising approach to enhance burn wound healing.

3.
CNS Neurosci Ther ; 30(8): e14894, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39107957

ABSTRACT

BACKGROUND: Subarachnoid hemorrhage (SAH) represents a severe stroke subtype. Our study aims to develop gender-specific prognostic prediction models derived from distinct prognostic factors observed among different-gender patients. METHODS: Inclusion comprised SAH-diagnosed patients from January 2014 to March 2016 in our institution. Collected data encompassed patients' demographics, admission severity, treatments, imaging findings, and complications. Three-month post-discharge prognoses were obtained via follow-ups. Analyses assessed gender-based differences in patient information. Key factors underwent subgroup analysis, followed by univariate and multivariate analyses to identify gender-specific prognostic factors and establish/validate gender-specific prognostic models. RESULTS: A total of 929 patients, with a median age of 57 (16) years, were analyzed; 372 (40%) were male, and 557 (60%) were female. Differences in age, smoking history, hypertension, aneurysm presence, and treatment interventions existed between genders (p < 0.01), yet no disparity in prognosis was noted. Subgroup analysis explored hypertension history, aneurysm presence, and treatment impact, revealing gender-specific variations in these factors' influence on the disease. Screening identified independent prognostic factors: age, SEBES score, admission GCS score, and complications for males; and age, admission GCS score, intraventricular hemorrhage, treatment interventions, symptomatic vasospasm, hydrocephalus, delayed cerebral ischemia, and seizures for females. Evaluation and validation of gender-specific models yielded an AUC of 0.916 (95% CI: 0.878-0.954) for males and 0.914 (95% CI: 0.885-0.944) for females in the ROC curve. Gender-specific prognostic models didn't significantly differ from the overall population-based model (model 3) but exhibited robust discriminative ability and clinical utility. CONCLUSION: Variations in baseline and treatment-related factors among genders contribute partly to gender-based prognosis differences. Independent prognostic factors vary by gender. Gender-specific prognostic models exhibit favorable prognostic performance.


Subject(s)
Sex Characteristics , Subarachnoid Hemorrhage , Humans , Subarachnoid Hemorrhage/diagnosis , Male , Female , Middle Aged , Prognosis , Aged , Adult , Retrospective Studies
4.
J Craniofac Surg ; 2024 Jul 19.
Article in English | MEDLINE | ID: mdl-39028181

ABSTRACT

BACKGROUND: Novice nurse need more guidance and professional confidence. This study aimed to explore early relevant predictive indicators for postoperative condition changes in brain tumor patients, which can be used to map patients' condition changes for novice nurses. METHODS: The authors prospectively collected clinical data, including nursing records of cerebral tumor patients after operation from July 2020 to June 2021 in the Department of Neurosurgery. Univariant analysis and multivariable logistic regression analysis were performed to identify independent predictors, the satisfaction questionnaire for teaching nurses is used to evaluate the new nurse's performance during perioperative period, psychometric scale is used to assess nurses' psychological stress. RESULTS: Nine hundred ninety-five cerebral tumor patients were enrolled in this study, and 115 (11.6%) patients' conditions were changed. Relevant predictive indicators, including vision, myodynamia, urine volume, nausea, vomit, pain, Glasgow Coma Scale (GCS), and Modified Early Warning System (MEWS), among them GCS, MEWS, and vision can basically cover the above indicators through simulation and calculation of the integrated model was set as Z=22*vision+1*GCS+3*MEWS. The satisfaction rate of teaching nurses has increased from 78.125 to 86.25%. Novice nurses' psychological stress was dropped from 30.637% to 19.844%. CONCLUSIONS: GCS and MEWS. GCS, MEWS and vision can map patients' condition change after cerebral tumor operation. The warning model has reduced their psychological stress, and the teaching nurse expressed that the effective evaluation of postoperative patient conditions by novice nurses reduces their nursing and teaching work greatly.

5.
Adv Sci (Weinh) ; : e2401869, 2024 Jul 03.
Article in English | MEDLINE | ID: mdl-38959395

ABSTRACT

Ionic conductive hydrogels (ICHs) have recently gained prominence in biosensing, indicating their potential to redefine future biomedical applications. However, the integration of these hydrogels into sensor technologies and their long-term efficacy in practical applications pose substantial challenges, including a synergy of features, such as mechanical adaptability, conductive sensitivity, self-adhesion, self-regeneration, and microbial resistance. To address these challenges, this study introduces a novel hydrogel system using an imidazolium salt with a ureido backbone (UL) as the primary monomer. Fabricated via a straightforward one-pot copolymerization process that includes betaine sulfonate methacrylate (SBMA) and acrylamide (AM), the hydrogel demonstrates multifunctional properties. The innovation of this hydrogel is attributed to its robust mechanical attributes, outstanding strain responsiveness, effective water retention, and advanced self-regenerative and healing capabilities, which collectively lead to its superior performance in various applications. Moreover, this hydrogel  exhibited broad-spectrum antibacterial activity. Its potential for biomechanical monitoring, especially in tandem with contact and noncontact electrocardiogram (ECG) devices, represents a noteworthy advancement in precise real-time cardiac monitoring in clinical environments. In addition, the conductive properties of the hydrogel make it an ideal substrate for electrophoretic patches aimed at treating infected wounds and consequently enhancing the healing process.

6.
PLoS One ; 19(6): e0305929, 2024.
Article in English | MEDLINE | ID: mdl-38917184

ABSTRACT

The underwater laser polarization detection technology integrates the polarization characteristics of light into the detection and identification of underwater targets. Addressing the challenge of poor accuracy in identifying targets in strong underwater scattering environments, this article proposes an overall scheme for a laser polarization underwater detection device that suppresses scatter using polarized pulse signals. By overcoming key technological barriers in the design of polarization-preserving optical detection systems and utilizing the method of differential amplitude to measure polarization, a laser polarization underwater detection device was developed and underwater polarization detection experiments were conducted, achieving precise detection of underwater targets. The results indicate that the underwater detection device we designed has a root mean square error of less than 5.7% to detect the polarization of the target, demonstrating the accuracy and precision of the underwater detection device.


Subject(s)
Lasers , Scattering, Radiation , Water , Light
7.
J Nanobiotechnology ; 22(1): 365, 2024 Jun 25.
Article in English | MEDLINE | ID: mdl-38918839

ABSTRACT

Bacteriophages (phages) represent a unique category of viruses with a remarkable ability to selectively infect host bacteria, characterized by their assembly from proteins and nucleic acids. Leveraging their exceptional biological properties and modifiable characteristics, phages emerge as innovative, safe, and efficient delivery vectors. The potential drawbacks associated with conventional nanocarriers in the realms of drug and gene delivery include a lack of cell-specific targeting, cytotoxicity, and diminished in vivo transfection efficiency. In contrast, engineered phages, when employed as cargo delivery vectors, hold the promise to surmount these limitations and attain enhanced delivery efficacy. This review comprehensively outlines current strategies for the engineering of phages, delineates the principal types of phages utilized as nanocarriers in drug and gene delivery, and explores the application of phage-based delivery systems in disease therapy. Additionally, an incisive analysis is provided, critically examining the challenges confronted by phage-based delivery systems within the domain of nanotechnology. The primary objective of this article is to furnish a theoretical reference that contributes to the reasoned design and development of potent phage-based delivery systems.


Subject(s)
Bacteriophages , Drug Delivery Systems , Nanomedicine , Bacteriophages/genetics , Humans , Nanomedicine/methods , Drug Delivery Systems/methods , Animals , Gene Transfer Techniques , Drug Carriers/chemistry , Nanoparticles/chemistry , Nanotechnology/methods
8.
Front Pharmacol ; 15: 1387949, 2024.
Article in English | MEDLINE | ID: mdl-38919253

ABSTRACT

Tumor metastasis presents a formidable challenge in cancer treatment, necessitating effective tools for anti-cancer drug development. Conventional 2D cell culture methods, while considered the "gold standard" for invasive studies, exhibit limitations in representing cancer hallmarks and phenotypes. This study proposes an innovative approach that combines the advantages of 3D tumor spheroid culture with impedance-based biosensing technologies to establish a high-throughput 3D cell invasion assay for anti-metastasis drug screening through multicellular tumor spheroids. In addition, the xCELLigence device is employed to monitor the time-dependent kinetics of cell behavior, including attachment and invasion out of the 3D matrix. Moreover, an iron chelator (deferoxamine) is employed to monitor the inhibition of epithelial-mesenchymal transition in 3D spheroids across different tumor cell types. The above results indicate that our integrated 3D cell invasion assay with impedance-based sensing could be a promising tool for enhancing the quality of the drug development pipeline by providing a robust platform for predicting the efficacy and safety of anti-metastatic drugs before advancing into preclinical or clinical trials.

9.
PhytoKeys ; 242: 333-348, 2024.
Article in English | MEDLINE | ID: mdl-38903849

ABSTRACT

Here, we describe a new species of Crotalaria L. discovered in Mengla County, Xishuangbanna Dai Autonomous Prefecture, Yunnan, China. The new species, Crotalariamenglaensis S.A.Rather, was confirmed by identifying diagnostic morphological characteristics, performing principal component analyses of phenotypic traits, and phylogenetic analyses based on nuclear ITS and plastid matK sequences. Phylogenetic analyses recovered the two accessions of the new species to be sister to C.bracteata Roxb. ex DC. In turn, these two species formed the sister clade to the two accessions of C.incana L. The morphometric analyses revealed that all three species were distinct, while the analyses of distinctive characters enabled unambiguous distinction of the new species by its growth habit, leaflets, flower structure and pod morphology. In contrast to the two related species, the new species is currently known only from ca. 100 mature individuals. Thus, this species is considered to be critically endangered.

10.
CNS Neurosci Ther ; 30(4): e14711, 2024 04.
Article in English | MEDLINE | ID: mdl-38644551

ABSTRACT

OBJECTIVE: To elucidate the relationship between USP19 and O(6)-methylguanine-DNA methyltransferase (MGMT) after temozolomide treatment in glioblastoma (GBM) patients with chemotherapy resistance. METHODS: Screening the deubiquitinase pannel and identifying the deubiquitinase directly interacts with and deubiquitination MGMT. Deubiquitination assay to confirm USP19 deubiquitinates MGMT. The colony formation and tumor growth study in xenograft assess USP19 affects the GBM sensitive to TMZ was performed by T98G, LN18, U251, and U87 cell lines. Immunohistochemistry staining and survival analysis were performed to explore how USP19 is correlated to MGMT in GBM clinical management. RESULTS: USP19 removes the ubiquitination of MGMT to facilitate the DNA methylation damage repair. Depletion of USP19 results in the glioblastoma cell sensitivity to temozolomide, which can be rescued by overexpressing MGMT. USP19 is overexpressed in glioblastoma patient samples, which positively correlates with the level of MGMT protein and poor prognosis in these patients. CONCLUSION: The regulation of MGMT ubiquitination by USP19 plays a critical role in DNA methylation damage repair and GBM patients' temozolomide chemotherapy response.


Subject(s)
Antineoplastic Agents, Alkylating , DNA Methylation , DNA Modification Methylases , DNA Repair Enzymes , Drug Resistance, Neoplasm , Temozolomide , Tumor Suppressor Proteins , Humans , Temozolomide/pharmacology , Temozolomide/therapeutic use , DNA Repair Enzymes/metabolism , DNA Repair Enzymes/genetics , DNA Modification Methylases/metabolism , Antineoplastic Agents, Alkylating/pharmacology , Antineoplastic Agents, Alkylating/therapeutic use , Animals , Cell Line, Tumor , Drug Resistance, Neoplasm/drug effects , Drug Resistance, Neoplasm/genetics , Tumor Suppressor Proteins/metabolism , Tumor Suppressor Proteins/genetics , DNA Methylation/drug effects , Mice, Nude , Brain Neoplasms/drug therapy , Brain Neoplasms/genetics , Brain Neoplasms/metabolism , Glioblastoma/drug therapy , Glioblastoma/genetics , Glioblastoma/metabolism , Mice , Male , Female , Dacarbazine/analogs & derivatives , Dacarbazine/pharmacology , Dacarbazine/therapeutic use , DNA Repair/drug effects , Endopeptidases/metabolism , Endopeptidases/genetics , Xenograft Model Antitumor Assays , Ubiquitination/drug effects
11.
Chem Commun (Camb) ; 60(27): 3717-3720, 2024 Mar 28.
Article in English | MEDLINE | ID: mdl-38481359

ABSTRACT

The effective and mild [4+1] annulation of ninhydrin-derived MBH carbonates with α,ß-unsaturated ketones has been developed, providing a wide range of multisubstituted furans in high yields (up to 90%) with excellent ß-regioselectivities. In contrast, the polysubstituted cyclopentenes bearing dispiro-bisindanedione motifs were obtained via classical [3+2] annulations by employing ninhydrin-derived MBH carbonates with 2-arylidene-1,3-indandiones under the same catalytic conditions. Furthermore, the structures of two kinds of cycloadducts were straightforwardly confirmed through X-ray diffraction analysis.

12.
J Nanobiotechnology ; 22(1): 90, 2024 Mar 04.
Article in English | MEDLINE | ID: mdl-38439048

ABSTRACT

Immune checkpoint inhibitor (ICI)-derived evolution offers a versatile means of developing novel immunotherapies that targets programmed death-ligand 1 (PD-L1)/programmed death-1 (PD-1) axis. However, one major challenge is T cell exhaustion, which contributes to low response rates in "cold" tumors. Herein, we introduce a fluorinated assembly system of LFNPs/siTOX complexes consisting of fluorinated EGCG (FEGCG), fluorinated aminolauric acid (LA), and fluorinated polyethylene glycol (PEG) to efficiently deliver small interfering RNA anti-TOX (thymus high mobility group box protein, TOX) for synergistic tumor cells and exhausted T cells regulation. Using a microfluidic approach, a library of LFNPs/siTOX complexes were prepared by altering the placement of the hydrophobe (LA), the surface PEGylation density, and the siTOX ratio. Among the different formulations tested, the lead formulation, LFNPs3-3/siTOX complexes, demonstrated enhanced siRNA complexation, sensitive drug release, improved stability and delivery efficacy, and acceptable biosafety. Upon administration by the intravenous injection, this formulation was able to evoke a robust immune response by inhibiting PD-L1 expression and mitigating T cell exhaustion. Overall, this study provides valuable insights into the fluorinated assembly and concomitant optimization of the EGCG-based delivery system. Furthermore, it offers a promising strategy for cancer immunotherapy, highlighting its potential in improving response rates in ''cold'' tumors.


Subject(s)
Nanoparticles , Neoplasms , T-Lymphocytes , B7-H1 Antigen , Ligands , Microfluidics , Immunotherapy , Neoplasms/drug therapy
13.
Pharmaceutics ; 16(3)2024 Mar 18.
Article in English | MEDLINE | ID: mdl-38543310

ABSTRACT

PURPOSE: It is well known that inhibition of Ca2+/calmodulin-dependent protein kinase II (CaMKII) provides cardiac protection in cases of myocardial ischemia-reperfusion injury. However, there are currently no cytoplasm-impermeable drugs that target CaMKII. The aim of this study was to develop curcumin albumin nanoparticles (HSA-CCM NPs) containing AC3-I and investigate their protective effects on hypoxia-reoxygenation (H/R)-induced injuries in adult rat cardiomyocytes and ischemia-reperfusion (I/R) injuries in isolated rat hearts. METHODS: HSA-CCM NPs were synthesized using ß-ME methods, while the membrane-impermeable peptide AC3-I was covalently linked via a disulfide bond to synthesize AC3-I@HSA-CCM NPs (AC3-I@NPs). Nanoparticle stability and drug release were characterized. To assess the cardiomyocyte uptake of AC3-I@NPs, AC3-I@NPs were incubated with cardiomyocytes under normoxia and hypoxia, respectively. The cardioprotective effect of AC3-I@NPs was determined by using a lactate dehydrogenase kit (LDH) and PI/Hoechst staining. The phosphorylation of phospholamban (p-PLB) was detected by Western blotting in hypoxia-reoxygenation and electric field stimulation models. To further investigate the protective role of AC3-I@NPs against myocardial ischemia-reperfusion injury, we collected coronary effluents and measured creatine kinase (CK) and LDH release in Langendorff rat hearts. RESULTS: AC3-I@NPs were successfully prepared and characterized. Both HSA-CCM NPs and AC3-I@NPs were taken up by cardiomyocytes. AC3-I@NPs protected cardiomyocytes from injury caused by hypoxia-reoxygenation, as demonstrated by decreased cardiomyocyte death and LDH release. AC3-I@NPs reduced p-PLB levels evoked by hypoxia-reoxygenation and electrical field stimulation in adult rat cardiac myocytes. AC3-I@NPs decreased the release of LDH and CK from coronary effluents. CONCLUSIONS: AC3-I@NPs showed protective effects against myocardial injuries induced by hypoxia-reoxygenation in cardiomyocytes and ischemia-reperfusion in isolated hearts.

14.
Neuropharmacology ; 251: 109905, 2024 Jun 15.
Article in English | MEDLINE | ID: mdl-38521229

ABSTRACT

Oxidative stress plays important roles in the pathogenesis of early brain injury (EBI) after subarachnoid hemorrhage (SAH). Tat-NR2B9c has shown efficacy as a neuroprotective agent in several studies. Here, we identified the neuroprotective role of Tat-NR2B9c after SAH and its related mechanisms. The results showed that Tat-NR2B9c treatment attenuated oxidative stress, therefore alleviated neuronal apoptosis and neurological deficits after SAH. Tat-NR2B9c treatment could alleviate mitochondrial vacuolization induced by SAH. Compared to SAH + vehicle group, Tat-NR2B9c resulted in the decrease of Acetylated superoxide dismutase2 (Ac-SOD2), Bcl-2-associated X protein (Bax) and cleaved-caspase3 (CC3) protein expression, and the up-regulation of Sirtunin 3 (Sirt3) and Bcl-2 protein level. Moreover, Tat-NR2B9c attenuated excitotoxicity by inhibiting the interaction of PSD95-NR2B-nNOS. Our results demonstrated that Tat-NR2B9c inhibited oxidative stress via inhibition of PSD95-NR2B-nNOS complex formation after SAH. Tat-NR2B9c may serve as a potential treatment for SAH induced brain injury.


Subject(s)
Brain Injuries , Neuroprotective Agents , Subarachnoid Hemorrhage , Rats , Animals , Subarachnoid Hemorrhage/drug therapy , Oxidative Stress , Peptides/pharmacology , Brain Injuries/metabolism , Neuroprotective Agents/pharmacology , Apoptosis
15.
Small Methods ; : e2301148, 2023 Dec 10.
Article in English | MEDLINE | ID: mdl-38072623

ABSTRACT

Ga2 O3 -based Ultraviolet-C photodetector (UVCPD) is considered the most promising UVCPD at present and is divided into Metal-Semiconductor-Metal (MSM) and PN junction types. Compared with MSM-PDs, PN-PDs exhibit superior transient performance due to the built-in electric field. However, current Ga2 O3 -based PN-PDs lack consideration for carrier collection and electric field distribution. In this study, PN-PDs with an interdigital n-Ga2 O3 layer and finger electrodes are fabricated on p-GaN/n-Ga2 O3 epilayers. Ultrafast response times of 31 µs (1/e decay) and 2.76 µs (fast component) are realized, which outperforms all Ga2 O3 UVC-PDs up to now. Under 0 V self-powered, the responsivity (0.25 A W-1 ) of interdigital PD is enhanced by the interdigital electrode structure due to increasing carriers' collection length. Under bias, the performances of interdigital PD with 41.7 A W-1 responsivity and 8243 selection ratios are significantly elevated by enhancing the built-in electric field in the Ga2 O3 region, which is 34.76 and 39.4 times those of traditional PDs, respectively. The intrinsic enhancing mechanism of interdigital structure is also investigated by interdigital PDs with various electrode spacings and perimeters. In summary, this paper not only reports a highly performed interdigitated structure p-GaN/n-Ga2 O3 UVCPDs, but also provides guidelines for structure design in Ga2 O3 -based PN-PDs.

16.
Transl Stroke Res ; 2023 Dec 22.
Article in English | MEDLINE | ID: mdl-38133745

ABSTRACT

Meningeal lymphatic vessels (mLVs) were recently discovered to be involved in the waste drainage process in the brain, which has also been associated with a variety of neurological diseases. This research paper hypothesizes that the drainage function of mLVs may be affected after chronic subdural hematoma (CSDH) and the alterations of mLVs' drainage may predict CSDH recurrence. In this prospective observational study, unenhanced 3D T2-fluid-attenuated inversion recovery (3D T2-FLAIR) MRI data were collected from CSDH patients and healthy participants for analysis. Patients with CSDH who underwent surgery received MRI scans before and after surgery, whereas healthy controls and patients with CSDH who received pharmaceutical treatment received only one MRI scan at enrollment. The signal unit ratio (SUR) of mLVs were then measured according to the MRI data and calculated to define mLVs' drainage function. Finally, the relationship between mLVs' drainage function and CSDH recurrence was analyzed accordingly. Thirty-four participants were enrolled in this study, including 27 CSDH patients and 7 controls. The SUR of mLVs in all CSDH patients changed significantly before and after surgery. Moreover, the drainage function of the mLVs ipsilateral to hematoma (mLVs-IH) in CSDH patients was significantly lower than that in the controls (p < 0.05). Last, a higher improvement rate of the drainage function of the mLVs-IH is correlated to a lower risk of recurrence (p < 0.05). This study revealed the mLVs' drainage dysfunction after CSDH through non-invasive MRI. Furthermore, the drainage function of mLVs is an independent predictive factor of CSDH recurrence.

17.
J Nanobiotechnology ; 21(1): 420, 2023 Nov 14.
Article in English | MEDLINE | ID: mdl-37957632

ABSTRACT

Immune therapy that targets PD-L1 (programmed cell death-ligand 1) is attractive to augment immune response by breaking the programmed cell death-1 (PD-1)/PD-L1 axis. However, T cell exhaustion associated with insufficient T cells infiltration may diminish the efficacy of cancer therapy. Here, we report a novel delivery system of FEGCG/FPEI@siTOX composed of fluorinated EGCG (FEGCG) and fluorinated polyethyleneimine (FPEI) for delivery of small interfering RNA anti-TOX (thymus high mobility group box protein, TOX) to treat tumor and metastasis. In this way, the reduction in PD-L1 expression by FEGCG can promote T-cell function, while inhibition of TOX expression with siTOX can alleviate T-cell exhaustion. FPEI are designed to deliver siRNA with high efficiency and low toxicity compared to classical PEI. Integrating FEGCG, FPEI and siTOX into such a novel system resulted in excellent anti-tumor and antimetastatic effects. It is a promising delivery system and potential strategy for the treatment of "cold" tumors.


Subject(s)
Neoplasms , T-Lymphocytes , Humans , T-Lymphocytes/metabolism , B7-H1 Antigen/metabolism , Neoplasms/drug therapy , RNA, Small Interfering
18.
Molecules ; 28(19)2023 Sep 22.
Article in English | MEDLINE | ID: mdl-37836604

ABSTRACT

Substrate-controlled diversity-oriented synthesis of polycyclic frameworks via [4 + 2] and [3 + 2] annulations between ninhydrin-derived Morita-Baylis-Hillman (MBH) adducts and 3,4-dihydroisoquinolines under similar reaction conditions have been developed. The reaction provides diversity-oriented synthesis of a series of novel and structurally complex spiro multi heterocyclic skeletons in good yields (up to 87% and 90%, respectively) with excellent diastereoselectivities (up to >25:1 dr). In particular, the switchable [4 + 2] and [3 + 2] annulation reactions are controlled by tuning the hydroxyl protecting group on the ninhydrin-derived MBH adduct to deliver structural diverse spiro[indene-2,2'-[1,3]oxazino[2,3-a]isoquinoline] and spiro[indene-2,1'-pyrrolo[2,1-a]isoquinoline], respectively. Furthermore, the relative configuration and chemical structure of two kinds of cycloadducts were confirmed through X-ray diffraction analysis.

19.
Opt Express ; 31(19): 30750-30766, 2023 Sep 11.
Article in English | MEDLINE | ID: mdl-37710612

ABSTRACT

Polarized remote sensing imaging has attracted more attention in recent years due to its wider detection information dimension compared to traditional imaging methods. However, the inherent instrument errors in optical systems can lead to errors in the polarization state of the incident and outgoing light, which is the polarization aberration of the optical system, resulting in a decrease in polarization detection accuracy. We propose a polarization aberration simplification calculation method for planar symmetric optical systems, by what only three ray samples are needed to obtain the distribution of polarization aberrations within the pupil. This method has a calculation accuracy close to traditional methods, and the sampling rate is 0.003 times that of traditional methods. Based on this, we designed a merit function that optimizes both wavefront and polarization aberrations simultaneously. It is found that diattenuation and retardance of the optical system are 62% and 58% of the original, and the polarization crosstalk term is reduced by 37% when the polarization weight factor takes an appropriate value. And at the same time, the wavefront aberration has also been well optimized.

20.
CNS Neurosci Ther ; 29(12): 3672-3683, 2023 12.
Article in English | MEDLINE | ID: mdl-37408392

ABSTRACT

Spontaneous subarachnoid hemorrhage (SAH) is one of the most devastating forms of stroke, with limited treatment modalities and poor patient outcomes. Previous studies have proposed multiple prognostic factors; however, relative research on treatment has not yet yielded favorable clinical outcomes. Moreover, recent studies have suggested that early brain injury (EBI) occurring within 72 h after SAH may contribute to its poor clinical outcomes. Oxidative stress is recognized as one of the main mechanisms of EBI, which causes damage to various subcellular organelles, including the mitochondria, nucleus, endoplasmic reticulum (ER), and lysosomes. This could lead to significant impairment of numerous cellular functions, such as energy supply, protein synthesis, and autophagy, which may directly contribute to the development of EBI and poor long-term prognostic outcomes. In this review, the mechanisms underlying the connection between oxidative stress and subcellular organelles after SAH are discussed, and promising therapeutic options based on these mechanisms are summarized.


Subject(s)
Brain Injuries , Subarachnoid Hemorrhage , Rats , Animals , Humans , Subarachnoid Hemorrhage/drug therapy , Rats, Sprague-Dawley , Oxidative Stress , Brain Injuries/metabolism , Organelles/metabolism , Apoptosis
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